My oldest birds are about 3 and a half months and in a large fully enclosed coop, there are 32 of them. Yesterday I was changing out the water and they were running around with what I thought was an old paper towel. Turned out it was a mid sized kangeroo rat ! They seemed to be having a great time with it, 5 minuites later it was gone. Guess they are taking over the cats job, lost her to the coyotes a month or so ago. I heard they would eat most anything now I believe it !